TY - JOUR
T1 - Viscosity of liquid crystal mixtures in the presence of electroconvection
AU - Nagaya, Tomoyuki
AU - Satou, Yuki
AU - Goto, Yoshitomo
AU - Hidaka, Yoshiki
AU - Orihara, Hiroshi
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research on Innovative Areas "Fluctuation and Structure" (No. 25103006) from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by a Grant-in-Aid for Challenging Exploratory Research (Nos. 24656017 and 15K13553) from the Japan Society for the Promotion of Science.
Publisher Copyright:
©2016 The Physical Society of Japan.
PY - 2016/7/15
Y1 - 2016/7/15
N2 - We have experimentally investigated the viscosity of nematic liquid crystal mixtures of p-methoxybenzylidene-p′-n-butylaniline (MBBA) and p-ethoxybenzylidene-p′-cyanoaniline (EBCA) in the presence of electroconvection under an ac electric field with 60 Hz. Although the viscosity of the mixtures with negative dielectric anisotropy shows a characteristic decrease in the high-voltage regime, that with positive dielectric anisotropy shows a monotonic increase as the applied voltage is increased. The experimental results suggest that the decrease in viscosity observed only for the mixtures with negative dielectric anisotropy is attributed to the negative contribution of electric stress caused by the anisotropic director distribution of the turbulent state.
AB - We have experimentally investigated the viscosity of nematic liquid crystal mixtures of p-methoxybenzylidene-p′-n-butylaniline (MBBA) and p-ethoxybenzylidene-p′-cyanoaniline (EBCA) in the presence of electroconvection under an ac electric field with 60 Hz. Although the viscosity of the mixtures with negative dielectric anisotropy shows a characteristic decrease in the high-voltage regime, that with positive dielectric anisotropy shows a monotonic increase as the applied voltage is increased. The experimental results suggest that the decrease in viscosity observed only for the mixtures with negative dielectric anisotropy is attributed to the negative contribution of electric stress caused by the anisotropic director distribution of the turbulent state.
UR - http://www.scopus.com/inward/record.url?scp=84978173144&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84978173144&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.85.074002
DO - 10.7566/JPSJ.85.074002
M3 - Article
AN - SCOPUS:84978173144
SN - 0031-9015
VL - 85
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 7
M1 - 074002
ER -